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通过 2 0 0 3年 4- 5月在黑河下游额济纳分两条路线 (a -a’和b -b’)采集水样 ,分析了额济纳现状水资源特征。远离河道区域水化学类型有HCO3·SO4-Na、Cl·SO4-Na·Ca、HCO3·Cl-Na·Ca和SO4·Cl-Na ;在河道附近或河道地区水化学类型主要是SO4·HCO3-Na ,类型单一 ;研究区矿化度和各离子含量随距离补给源的远近增减而升降 ,表明它们主要依赖于上游补给水量 ;同时 ,额济纳地处干旱区 ,降雨稀少 ,该区植被的生长发育主要依靠浅层地下水 ,地下水环境的改变直接导致了区域生态的变化。
Water samples were collected from Ejin of the lower reaches of Heihe River in April-May 2003 on two routes (a-a ’and b-b’), and the current water resources characteristics of Ejin were analyzed. The chemical types of water away from the riverway are HCO3 · SO4-Na, Cl · SO4-Na · Ca, HCO3 · Cl-Na · Ca and SO4 · Cl-Na. The chemical types of water near the river courses or in the river courses are mainly SO4 · HCO3- Na, with a single type. The salinity and ion content in the study area rose and decreased with the distance from the recharge source, indicating that they mainly depend on the amount of upstream recharge water. Meanwhile, Ejina was located in the arid area with few rainfall and the vegetation growth Development depends mainly on shallow groundwater, groundwater environment changes directly led to changes in regional ecology.